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Two genomes of highly polyphagous lepidopteran pests (Spodoptera frugiperda, Noctuidae) with different host-plant ranges

Anaïs Gouin 1 Anthony Bretaudeau 2, 3 Kiwoong Nam 4 Sylvie Gimenez 4 Jean-Marc Aury 5, 6 Bernard Duvic 4 Frederique Hilliou 7 Nicolas Durand 8 Nicolas Montagné 9 Isabelle Darboux 4 Suyog Kuwar 10 Thomas Chertemps 11 David Siaussat 11 Anne Bretschneider 10 Yves Moné 4 Seung-Joon Ahn 10 Sabine Hänniger 10 Anne-Sophie Gosselin Grenet 4 David Neunemann 10 Florian Maumus 12 Isabelle Luyten 12 Karine Labadie 6 Wei Xu 13 Fotini Koutroumpa 14 Jean-Michel Escoubas 4 Angel Llopis 15 Martine Maïbèche-Coisne 9 Fanny Salasc 4 Archana Tomar 16 Alisha Anderson 17 Sher Khan 10 Pascaline Dumas 18 Marion Orsucci 4 Julie Guy 6 Caroline Belser 6 Adriana Alberti 6 Benjamin Noel 6 Arnaud Couloux 6 Jonathan Mercier 6 Sabine Nidelet 19 Emeric Dubois 19 Nai-Yong Liu 20 Isabelle Boulogne 9 Olivier Mirabeau 14 Gaelle Le Goff 7 Karl Gordon 21 John Oakeshott 21 Fernando Consoli 22 Anne-Nathalie Volkoff 4 Howard Fescemyer 23 James Marden 23 Dawn Luthe 23 Salvador Herrero 15 David Heckel 10 Patrick Wincker 6 Gael Kergoat 14 Joelle Amselem 12 Hadi Quesneville 12 Astrid Groot 10 Emmanuelle Jacquin-Joly 14 Nicolas Nègre 4, * Claire Lemaitre 1, * Fabrice Legeai 1, 3 Emmanuelle D’alençon 4 Philippe Fournier 4
* Corresponding author
1 GenScale - Scalable, Optimized and Parallel Algorithms for Genomics
Inria Rennes – Bretagne Atlantique , IRISA-D7 - GESTION DES DONNÉES ET DE LA CONNAISSANCE
2 Plateforme bioinformatique GenOuest [Rennes]
UR1 - Université de Rennes 1, Plateforme Génomique Santé Biogenouest®, Inria Rennes – Bretagne Atlantique , IRISA-D7 - GESTION DES DONNÉES ET DE LA CONNAISSANCE
Abstract : Emergence of polyphagous herbivorous insects entails significant adaptation to recognize, detoxify and digest a variety of host-plants. Despite of its biological and practical importance - since insects eat 20% of crops - no exhaustive analysis of gene repertoires required for adaptations in generalist insect herbivores has previously been performed. The noctuid moth Spodoptera frugiperda ranks as one of the world’s worst agricultural pests. This insect is polyphagous while the majority of other lepidopteran herbivores are specialist. It consists of two morphologically indistinguishable strains (“C” and “R”) that have different host plant ranges. To describe the evolutionary mechanisms that both enable the emergence of polyphagous herbivory and lead to the shift in the host preference, we analyzed whole genome sequences from laboratory and natural populations of both strains. We observed huge expansions of genes associated with chemosensation and detoxification compared with specialist Lepidoptera. These expansions are largely due to tandem duplication, a possible adaptation mechanism enabling polyphagy. Individuals from natural C and R populations show significant genomic differentiation. We found signatures of positive selection in genes involved in chemoreception, detoxification and digestion, and copy number variation in the two latter gene families, suggesting an adaptive role for structural variation.
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Anaïs Gouin, Anthony Bretaudeau, Kiwoong Nam, Sylvie Gimenez, Jean-Marc Aury, et al.. Two genomes of highly polyphagous lepidopteran pests (Spodoptera frugiperda, Noctuidae) with different host-plant ranges. Scientific Reports, Nature Publishing Group, 2017, 7 (1), pp.1-12. ⟨10.1038/s41598-017-10461-4⟩. ⟨hal-01633879⟩

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